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ST5080 Datasheet

  • ST5080

  • PIAFE PROGRAMMABLE ISDN AUDIO FRONT END

  • 32頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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ST5080A
PIAFE
PROGRAMMABLE ISDN AUDIO FRONT END
ADVANCE DATA
FEATURES:
Complete CODEC and FILTER system including:
PCM ANALOG TO DIGITAL AND DIGITAL TO
ANALOG CONVERTERS
POWERFUL ANALOG FRONT END CAPA-
BLE TO INTERFACE DIRECTLY:
- Microphone Dynamic, Piezo or Electrete
- Earpiece down to 100鈩?or up to 150nF
- Loudspeaker down to 50鈩?or Buzzer up to
600nF.
TRANSMIT BAND-PASS FILTER
ACTIVE RC NOISE FILTER
RECEIVE LOW-PASS FILTER WITH SIN X/X
CORRECTION
MU-LAW OR A-LAW SELECTABLE COM-
PANDING CODER AND DECODER
PRECISION VOLTAGE REFERENCE
Phones Features:
DUAL SWITCHABLE MICROPHONE AMPLI-
FIER INPUTS. GAIN PROGRAMMABLE: 15
dB RANGE, 1 dB STEP.
LOUDSPEAKER AMPLIFIER AUXILIARY
OUTPUT. ATTENUATION PROGRAMMABLE:
30 dB RANGE, 2 dB STEP.
SEPARATE EARPIECE AMPLIFIER OUTPUT.
ATTENUATION PROGRAMMABLE: 15 dB
RANGE, 1 dB STEP
AUXILIARY SWITCHABLE EXTERNAL RING
INPUT (EAIN).
TRANSIENT SUPRESSION SIGNAL DURING
POWER ON.
INTERNAL PROGRAMMABLE SIDETONE
CIRCUIT. ATTENUATION PROGRAMMABLE:
15 dB RANGE, 1 dB STEP.
INTERNAL RING OR TONE GENERATOR IN-
CLUDING DTMF TONES, SINEWAVE OR
SQUAREWAVE WAVEFORMS. ATTENU-
ATION PROGRAMMABLE: 27 dB RANGE, 3
dB STEP.
COMPATIBLE WITH HANDS-FREE CIRCUIT
TEA7540.
ON CHIP SWITCHABLE ANTI-ACOUSTIC
FEED-BACK CIRCUIT (ANTI-LARSEN).
SO28
ORDERING NUMBER:
ST5080D
General Features:
EXTENDED TEMPERATURE RANGE OP-
ERATION
(*)
鈥?40擄C TO +85擄C.
EXTENDED POWER SUPPLY RANGE 5V鹵10%.
60 mW OPERATING POWER (TYPICAL).
1.0 mW STANDBY POWER (TYPICAL).
CMOS DIGITAL INTERFACES.
SINGLE + 5V SUPPLY.
DIGITAL LOOPBACK TEST MODE.
PROGRAMMABLE DIGITAL AND CONTROL
INTERFACES:
鈥?Digital PCM Interface associated with
separate serial Control Interface MI-
CROWIRE鈩?compatible.
鈥?GCI interface compatible.
(*)
Functionality guaranteed in the range 鈥?40擄C to +85擄C;
Timing and Electrical Specifications are guaranteed in the range
鈥?25擄C to +85擄C.
APPLICATIONS:
ISDN TERMINALS.
DIGITAL TELEPHONES
CT2 AND GSM APPLICATIONS
1/32
December 1994
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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